WAY EASIER THAN IT LOOKS, PLEASE HELP! D:< What weakens the author's argument in the third paragraph of "Coming Soon to a Neighborhood Near You"?

The next challenge is finding a feed store—where most of the supplies you’ll need can be found. Feed stores generally offer a cheap bedding material such as pine shavings as well as prepared food to supplement the plants and bugs that chickens can find in a reasonably healthy backyard. Then there are the chickens themselves, which range in price from a couple bucks for a chick to ten or fifteen dollars for a mature, feathered-out bird. (Most seasoned backyard farmers recommend starting with mature hens.) Of course, it you want to raise your hens from chicks, you’ll need a warming light as well as some other equipment.

a.) The author does not specify how many hens a person should purchase, casting doubt on his or her authority.
b.) The author does not tell the reader what kind of bedding supplies will be needed for the coop.
c.) The author does not explain what vague phrases like "some other equipment" mean, lessening credibility.
d.) The author does not define the terms "mature hen" or "seasoned backyard farmers" for the reader.